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Hyginus Gromaticus, (surname from groma, a
surveying device) was a Latin writer on land-surveying, who
flourished in the reign of Trajan (A.D. 98–117). Fragments of a work on
legal boundaries attributed to him will be found in C. F. Lachmann,
Gromatici Veteres, i. (1848).

A treatise on Roman military
camps (De Munitionibus Castrorum), was formerly
attributed to him, but is probably of later date, about the 3rd
century A.D. (ed. W. Gemoll, 1879; A. von Domaszewski, 1887) and is
now attributed to "Pseudo-Hyginus".